Acoustic transducer in system for gas temperature measurement in gas turbine engine
First Claim
1. A gas turbine engine including an apparatus for controlling operation of the gas turbine engine, and the engine having a boundary structure defining a flow path passing through the engine, the apparatus for controlling operation of the engine comprising:
- at least one acoustic transmitter/receiver device located on the boundary structure at a predetermined axial location along the flow path, the acoustic transmitter/receiver device including;
an elongated sound passage defined by a surface of revolution having opposing first and second ends and a central axis extending between the first and second ends;
an acoustic sound source located at the first end; and
an acoustic receiver located within the sound passage between the first and second ends;
the boundary structure including an opening extending from outside the boundary structure to the flow path; and
the second end of the surface of revolution is affixed to the boundary structure at the opening for passage of acoustic signals between the sound passage and the flow path.
4 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for controlling operation of a gas turbine engine including at least one acoustic transmitter/receiver device located on a flow path boundary structure. The acoustic transmitter/receiver device includes an elongated sound passage defined by a surface of revolution having opposing first and second ends and a central axis extending between the first and second ends, an acoustic sound source located at the first end, and an acoustic receiver located within the sound passage between the first and second ends. The boundary structure includes an opening extending from outside the boundary structure to the flow path, and the second end of the surface of revolution is affixed to the boundary structure at the opening for passage of acoustic signals between the sound passage and the flow path.
42 Citations
19 Claims
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1. A gas turbine engine including an apparatus for controlling operation of the gas turbine engine, and the engine having a boundary structure defining a flow path passing through the engine, the apparatus for controlling operation of the engine comprising:
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at least one acoustic transmitter/receiver device located on the boundary structure at a predetermined axial location along the flow path, the acoustic transmitter/receiver device including; an elongated sound passage defined by a surface of revolution having opposing first and second ends and a central axis extending between the first and second ends; an acoustic sound source located at the first end; and an acoustic receiver located within the sound passage between the first and second ends; the boundary structure including an opening extending from outside the boundary structure to the flow path; and the second end of the surface of revolution is affixed to the boundary structure at the opening for passage of acoustic signals between the sound passage and the flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A gas turbine engine including an apparatus for controlling operation of the gas turbine engine, and the engine having a boundary structure defining a flow path passing through the engine, the apparatus for controlling operation of the engine comprising:
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first and second acoustic transmitter/receiver devices located on the boundary structure at predetermined axial locations along the flow path, the acoustic transmitter/receiver devices each including; an elongated sound passage defined by a surface of revolution having opposing first and second ends and a central axis extending between the first and second ends; an acoustic sound source located at the first end; and an acoustic receiver located within the sound passage between the first and second ends, the acoustic receiver including a support rod extending through a hole in the surface of revolution between the first and second ends, the support rod having an inner end located within the sound passage and supporting a receiver end for receiving acoustic signals into the acoustic receiver; the boundary structure including first and second openings extending from outside the boundary structure to the flow path; and the second end of each surface of revolution is affixed to the boundary structure at a respective one of the openings for passage of acoustic signals between the sound passage and the flow path. - View Dependent Claims (17)
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18. A gas turbine engine including an apparatus for controlling operation of the gas turbine engine, and the engine having a boundary structure defining a flow path passing through the engine, the apparatus for controlling operation of the engine comprising:
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first and second acoustic transmitter/receiver devices located on the boundary structure at predetermined axial locations along the flow path, the acoustic transmitter/receiver devices each including; an elongated sound passage defined by a surface of revolution having opposing first and second ends and a central axis extending between the first and second ends; an acoustic sound source located at the first end; and an acoustic receiver located within the sound passage between the first and second ends; the boundary structure including first and second openings extending from outside the boundary structure to the flow path; the second end of each surface of revolution is affixed to the boundary structure at a respective one of the openings for passage of acoustic signals between the sound passage and the flow path; a signal generator producing at least one signal having a distinct signature defined by a set of predetermined frequencies forming a non-broadband signal that is output as an acoustic sound signal at the acoustic sound source; a signal processor configured to compare signals received at the second acoustic transmitter/receiver device to one or more transmitted signals to identify a similarity of a received signal to a transmitted signal to identify a transmission time for the received signal, and the processor configured to determine a time-of-flight for the received signal and to process the time-of-flight to determine a temperature in a region of the predetermined axial location. - View Dependent Claims (19)
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Specification